Restructuring and Severance (Tables)

12 Months Ended

Dec. 31, 2024

Restructuring and Related Activities [Abstract]

Summary of Activity in The Restructuring and Severance Liability

Liabilities have been established for employee separations and contract terminations. A summary of activity in the restructuring and severance liability is shown below:

(dollars in millions)	Employee Separation			Contract Terminations			Total
Balance as of December 31, 2021	$	0.1		$	—		$	0.1
Charges		—			—			—
Utilizations		(0.1	)		—			(0.1	)
Balance as of December 31, 2022	$	—		$	—		$	—
Charges		10.8			—			10.8
Utilizations		(0.6	)		—			(0.6	)
Balance as of December 31, 2023	$	10.2		$	—		$	10.2
Charges		59.9			0.6			60.5
Utilizations		(29.9	)		(0.4	)		(30.3	)
Balance as of December 31, 2024	$	40.2		$	0.2		$	40.4

Summary of Restructuring Activity

A summary of restructuring activity is presented below:

(dollars in millions)	Network			Corporate			Total
Balance as of December 31, 2021	$	0.1		$	—		$	0.1
Charges		—			—			—
Utilizations		(0.1	)		—			(0.1	)
Balance as of December 31, 2022	$	—		$	—		$	—
Charges		10.3			0.5			10.8
Utilizations		(0.6	)		—			(0.6	)
Balance as of December 31, 2023	$	9.7		$	0.5		$	10.2
Charges		59.3			1.2			60.5
Utilizations		(29.8	)		(0.5	)		(30.3	)
Balance as of December 31, 2024	$	39.2		$	1.2		$	40.4